The single beam of china laser pointer is green

The laser is found in the early 1960s, a new light source [1], and its discovery is one of the greatest achievements of 20th century science and technology. Laser technology is developing very rapidly since its inception, a major means of enhanced technology in the 1970s. The beginning of enhanced treatment for the surface, now have become an a high energy density beam surface laser surface hardening of principle when the laser beam to the surface, the laser is absorbed by the material on a small surface, in a very short time (10 - 1 ~ 10 - 7 s) within the material is heated to high temperature (heating rate up to 105 ~ 109 ℃ s), so that on / off, or remove the surface cooling rate soon (cooling rate up to 104 into heat, the surface material heated warming. The single beam of china laser pointer is green.
As the power is concentrated solid phase transformations occur in the material, melting or even evaporation. When the laser beam be cut ℃ s), and natural cooling can be achieved surface hardening. According to the laser beam and / different, different types of laser surface hardening. Received date: 2002 - 09 - 20 material surface the role of the power density, duration of action and modes of action Author: Qu Jingxin (1935 -), male, Yantai, Shandong, China University of Mining and Technology (Beijing) Electrical and Mechanical and Information Engineering, Professor doctoral supervisor, engaged in research work in materials science, engineering, tribology and material surface engineering. This kind ofchina laser pointercan only give out the single beam.
Classification of laser surface hardening technology. Laser surface hardening technology categories shown in Figure 1. Figure 2 shows the laser surface hardening method of location coordinates of the laser power density and duration of action of these processes depends largely on the power density and irradiation time. Stamp punch laser hardening: 366 mm × mm 645 (wall thickness 9 mm) cylindrical hole mode with the cylinder pin mode. The distribution of 25 000 diameter 89 mm hole and pin, material for carbon steel, radial error does not exceed 0 05 mm. The conventional heat treatment can not be met. Punch production cycle 3 to 4 months, the life of just over a month supply of stamps. After laser surface hardening on the edge of the punch hole mold around the hole 18 of HRC hardness to 70 HRC hardened layer depth of 0 10 ~ 0 50 mm, almost no distortion. The single beam of china laser pointer is as powerful as it should be.
Imports punch printing stamps in the past 1.5 million, 500,000 domestic punch printing, laser hardening Figure 2 laser surface hardening characteristics (1) laser power density and power density and duration of the relationship between three laser beam surface hardening The fast heating (105 ~ 109 ° C s), high temperature heating, natural cooling of the substrate, high-speed (> 10 4 / ° C s), high production efficiency. / (2) surface hardening layer of fine, high hardness, good quality, smooth surface, no oxidation, high strength, toughness, wear resistance, corrosion resistance. (3) heat-affected zone is small, a small deformation of the workpiece. The user should pay attention to the use life ofchina laser pointer.
Local heating, surface hardening treatment can be carried out on the shape of the complex, the asymmetric geometry of the parts and special parts, such as the bottom of the blind hole, deep hole wall and so on. The whole process easy to implement automatic control. No pollution, good working conditions. Laser surface hardening technology, there are some problems, such as the high reflectivity of materials to be anti-reflective treatment, not suitable for a large area processing, laser conversion efficiency of low energy laser equipment prices higher and so on. Therefore, the use of laser surface hardening technology to select the appropriate parts, materials and technology, full use of its advantages, making high-efficiency, high cost-effective way. After printing 1 0 million can still be used [3]. The preheating time of green laser pointer is very short.